Cutting attachment for sewing-machines



A. S. ROBINSON.

CUTTING ATTACHMENT FOR SEWING MACHINES.

APPLICATION FILED JAN. 6, 1915.

1 1 9 3,82 3 Patented Aug. 8, 1916.

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A. S. ROBINSON.

CUTTING ATTACHMENT FOR SEWING MACHINES. 1

APPLICATION FILED JAN. 6. 1915.

1,193,823. Patented Aug. 8,1916.

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K I v AQUILA S. ROBINSON, 0F PHILADELPHIA, PENNSYLVANIA.

CUTTING ATTACHMENT FOR SEWING-MACHINES.

Application filed January 6, 1915.

To all whom it may concern:

Be it known that I, A UILA S. ROBINSON, a citizen of the United States,residing at Philadelphia, in the county of Philadelphia and State ofPennsylvania, have invented certain new and useful Improvements inCuttin Attachments for Sewing-Machines, of which the following is aspecification.

My invention relates to improvements in cutting attachments for sewingmachines such as are adapted to cut the goods after it leaves theneedle, said cutting operatlon being under the control of the operatorso that the goods may be cut in any lengths desired.

A further object is to provide improve ments of the character statedwhich are especially adapted for use in cutting shirt centers, buttonstays, drawer bands, and the like, and at a single operation severs thegoods without interfering with the ordinary functions of the sewingmachine.

lVith these and other objects in view, the invention consists in certainnovel features of construction and combinations and arrangements ofparts as will be more fully hereinafter described and pointed out in theclaims.

In the accompanying drawings: Figure 1 is a top plan view illustratingmy improvements. Fig. 2 is an end view partly broken away. Fig. 3 is anenlarged view in side elevation of my improved cutting attachment. Fig.4 is a view in section on the line 44 of Fig. 3 showing the blade in itslowered position. Fig. 5 is a View in transverse section on the line 55of Fig. 3, and Fig. 6 is a view in section on the line 66 of Fig. 3.

1 represents a table mounted on uprights 2, and supporting the bed plate3 of an ordinary sewing machine.

4 is the arm of the sewing machine having the ordinary head 5 at itsfree end in which the presser bar 6 and needle bar 7 are mounted.

8 is the presser foot at the lower end of the bar 6, and 9 is the needleat the lower end of the needle bar, movable through the presser foot tosew the goods in the ordinary way.

10 represents the goods which we will assume to be a strip of materialfor the manufacture of shirt centers, button stays, drawer bands, andthe like which is fed to the needle and presser foot in a continuousstrip,

Specification of Letters Patent.

Patented Aug. 8, 1916.

Serial No. 762. i

and by ordinary methods heretofore in vogue, this strip after it hasbeen sewed, is cut into lengths which requires a separate and distinctoperation from the sewing operation. lVith my improvements, the stripcan be cut into lengths desired, as the goods is sewed, as will now beexplained.

To the bed plate 3, the base 11 of my im proved cutting attachment issecured by countersunk screws 12, and on the base 11, a curved standard13 is provided. The curved arm 14 is pivotally connected at one end tothe lower portion of standard 13 by means of a screw 15, and at its freeend at one side, is provided with a. guide plate 16. This guide plate'l6is rigidly secured to the arm by welding, soldering or by any otherimproved method, and at its ends is made with outwardly projectingflanges 17 to receive and hold an integral extension 18 on the cuttingblade 19. The cutting blade 19 is formed with a slot 20 and a set screw21 is projected through the slot 20 and screwed into a threaded opening22 in arm 14, so that by means of this screw, a cutting blade may beadjusted to suit conditions.

23 represents a stationary cutting blade rigidly secured to the base 11,and having its upper face inclined as shown at 24, registering with aninclined plane 25 on the base over which the goods are directed, so thatthe cutting attachment offers little or no obstruction to the feed ofthe goods, but permits the same to be continuously fed as sewed, and inposition under the cutting blade 19, so that it can be severed wheneverdesired.

A coiled spring 26'is removably connected at one end to a hook 27 on thearm 14, and at its other end removably connected to a hook 28 on thefree end of standard 13. This coiled spring .26 normally holds the arm14 and cutting blade in an elevated position, and returns the same tosuch position after the cutting operation.

A lever 29 is pivotally connected to the free end of standard 14, at oneside of the latter, by means of a screw 30, and this lever 29 isprovided with a relatively short arm 31 extending at an angle theretoand carry ing a roller 32 at its free end. This roller 32 is located ina. recess 33 in the arm 31, and is supported on a journal pin 34. Theroller 32 bears against the upper face of arm 14, so that when the lever29 is moved downwardly, it will operate to force the arm 14 downwardlyand compel the cutting blade 19 to sever the goods.

A treadle is provided under the table 1, and is connected by a rod orother suitable device 36 with the free end of lever 29, said rodextending upwardly through openings 87 and 38 in the table 1 and bedplate 3 respectively.

Assuming the sewing machine to be a power machine, it is only necessaryfor the operator to feed the goods and from time to time operate thecutter to sever the same into the lengths desired. By reason of theinclined plane 25, the goods will move readily over the stationary blade24: and under the movable blade 19, so that when the operator depressesthe treadle 35, the lever 29 with its arm 31, will force pivoted arm 14downwardly and compel the blade 19 to sever the goods against thestationary cutting blade 24 and the cut length will fall over the edgeof the table into any suitable receptacle (not shown) provided for thepurpose. By reason of this construction, the goods can be cut in lengthsas they are sewed, and hence one operation heretofore required after thesewing operation, is entirely done away with, and with my improvementattached to a sewing machine, a great saving of time and labor is had.Furthermore, the goods when fed in long strips pile up, and are more orless mussed or wrinkled when unwound or straightened out for cutting,and this is also entirely overcome by my improvements.

Various slight changes might be made in the general form and arrangementof parts described without departing from my invention, and hence I donot limit myself to the precise details set forth, but consider myselfat liberty to make such changes and alterations as fairly fall withinthe spirit and scope of the appended claims.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent is: V

1. An attachment for sewing machines comprising a base adapted to bearranged directly behind the presser foot and having an upwardly andrearwardly inclined face terminating at the rear in a cutting edge, anarm pivotally mounted on said base, a blade on said arm adapted tocooperate with said cutting edge and means under the control of theoperator for actuating said pivoted arm, substantially as described.

2. A cutting attachment for sewing machines comprising a base adapted tobe secured to the machine directly behind the presser foot, said basebeing tapered upwardly and rearwardly terminating in a cutting edge atthe back, an arm pivotally connected to said base, a blade on said armadapted to codperate with said cutting edge, a lever pivotally mountedadjacent said arm, and adapted to depress the same, a pedal and anoperative connection between said pedal and said lever, substantially asdescribed.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing Witnesses.

AQUILA S. ROBINSON.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. 0.

